Note 60 — COMMENCEMENT OF ORGANIC LIFE— SEA PLANTS, CORALS, ETC.
Reading edition
In the Cumbrian limestone occur “calamoporæ, lithodendra, cyathophylla, and orbicula.”—Philips. The asaphus and trinucleus (crustacea) have been found respectively in the slate rocks of Wales, and the limestone beds of the grawacke group in Bohemia. That fragments of crinoidea, though of no determinate species, occur in this system, we have the authority of Mr. Murchison.—Silurian System, p. 710.